To make guacamole: Dice tomato, 1/2 onion, and garlic to mix with avocados. Add 1 teaspoon sugar, 1/2 teaspoon salt and mix. Add 1/2 of the cilantro and the juice of 3 key limes.
Add onion and minced garlic and saute.
Add cilantro, then shrimp, chipotle, cumin, black pepper, and 1/2 teaspoon onion powder. Saute all together. Add the juice of 5 key limes.
Mix salad together: Lettuce bed topped with guacamole and shrimp mixture. Eat right away.